Flowing Fix: Generating QRcodes

Quick Response Codes (QR codes) are a type of two-dimensional barcode (or matrix barcode) which allows for encoding of information that can be read rapidly. For more about QR codes see https://en.wikipedia.org/wiki/QR_code

Websites to generate QR codes:

• http://www.dmcinfo.com/Blog/articleType/ArticleView/articleId/296/The-DMC-vCard-MeCARD-QR-Code-Generator-ie-Business-Cards-for-Geeks.aspx

• http://keremerkan.net/qr-code-and-2d-code-generator/

• https://www.qr-code-generator.com/

• http://www.qrhacker.com/

• http://www.javascripter.net/faq/rgbtohex.htm

• http://2d-code.co.uk/qr-code-generators

LaTeX can generate QR codes: 

To enable this capability in LaTeX, include the qrcode package (https://ctan.org/pkg/qrcode?lang=en) A tutorial with simple example code (see Example 11) can be seen at https://www.hydro-perturbations.com/help-files/latex-quick-examples


iOS apps for QR codes:
http://next140.com/iphone-qr-code-scanner-roundup/


Android apps for QR codes:
http://www.dmcinfo.com/Blog/articleType/ArticleView/articleId/296/The-DMC-vCard-MeCARD-QR-Code-Generator-ie-Business-Cards-for-Geeks.aspx

Computing the optimal road trips

If you have a trip will multiple stops and you are having trouble finding an optimal route here are some links to help you.

Optimizing routes (web interactivity):
1) MapQuest [26 locations]: https://www.mapquest.com/routeplanner
2) RouteXL[20 locations for free]: https://www.routexl.com/


For the more adventurous (coding required):
Genetic Algorithm approach:
from Randal Olson' blog which uses Python with Google Maps:
http://www.randalolson.com/2016/07/30/the-optimal-u-s-national-parks-centennial-road-trip/

Using Gurobi solver: 
from Nathan Brixius's blog which uses Python

https://nathanbrixius.wordpress.com/2016/06/09/computing-optimal-road-trips-using-operations-research/

Using Concorde solver, the world’s best Traveling Salesman Problem (TSP) solver:

from Nathan Brixius's blog which uses Python

https://nathanbrixius.wordpress.com/2016/06/16/finding-optimal-state-capitol-tours-on-the-cloud-with-neos/

Flowing Fix: Mathpix Snipping Tool

There are times when you need to replicate an equation or block of text from a PDF file. If the PDF file was converted from a typed file, chances are that the text in the PDF can be selected. However, for equations (and if the PDF is image-based), you were out of luck, until now. Mathpix Snipping Tool is perfect for capturing a screenshot of the equation or text and automatically converts it to LaTeX. It is almost magical, capable of converting typed and handwritten information to LaTeX.
Download Mathpix Snipping Tool for MS Windows, macOS, and Ubuntu from https://mathpix.com/